low2.3
CVE-2026-107886
OpenPrinting CUPS before 2.4.20 contains a double-free in printer-class management.
Impact
OpenPrinting CUPS before 2.4.20 contains a double-free in printer-class management. When CUPS-Add-Modify-Class replaces an existing class member list, add_class() frees pclass->printers without clearing the pointer. If subsequent validation fails, the class retains the dangling pointer; CUPS-Delete-Class subsequently frees the same allocation in cupsdDeletePrinter(). A client authorized to modify and delete classes can cause scheduler-wide denial of service. The default policy requires @SYSTEM privileges.
Affected products
| Vendor | Product | Affected versions |
|---|---|---|
| Openprinting | Cups | from 1.4.8 before 2.4.20 |